staging: bcm: nvm.c: Cleaning up a array that is filled incompletely

Array 'SigBuff' is filled incompletely.
Someone forget to multiply for the sizeof type.

This was partly found using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/bcm/nvm.c

@@ -3591,7 +3591,7 @@ int BcmCopyISO(struct bcm_mini_adapter *Adapter, struct bcm_flash2x_copy_section
 
 			if (IsThisHeaderSector == TRUE) {
 				/* If this is header sector write 0xFFFFFFFF at the sig time and in last write sig */
-				memcpy(SigBuff, Buff + sigOffset, MAX_RW_SIZE);
+				memcpy(SigBuff, Buff + sigOffset, sizeof(SigBuff));
 
 				for (i = 0; i < MAX_RW_SIZE; i++)
 					*(Buff + sigOffset + i) = 0xFF;
@@ -3704,7 +3704,7 @@ int BcmCopyISO(struct bcm_mini_adapter *Adapter, struct bcm_flash2x_copy_section
 
 			if (IsThisHeaderSector == TRUE) {
 				/* If this is header sector write 0xFFFFFFFF at the sig time and in last write sig */
-				memcpy(SigBuff, Buff + sigOffset, MAX_RW_SIZE);
+				memcpy(SigBuff, Buff + sigOffset, sizeof(SigBuff));
 
 				for (i = 0; i < MAX_RW_SIZE; i++)
 					*(Buff + sigOffset + i) = 0xFF;